<template>
  <h4>当前count值是：{{ count.num }}</h4>
  <button @click="count = { num: 888 }">点我替换</button>
  <button @click="count.num++">点我+1</button>
  <hr />
  <h4>{{ person }}</h4>
  <h2>姓名：{{ name }}</h2>
  <h2>年龄：{{ age }}</h2>
  <h2>薪资：{{ job.j1.salary }}K</h2>
  <button @click="name += '-'">修改姓名</button>
  <button @click="age++">增长年龄</button>
  <button @click="job.j1.salary++">增长薪资</button>
</template>
    
<script>
import { ref, reactive, toRef, toRefs, shallowReactive, shallowRef } from 'vue'
export default {
  name: 'App',
  setup() {
    // let person = shallowReactive({ //只考虑第一层数据的响应式
    let person = reactive({
      name: '张三',
      age: 19,
      job: {
        j1: {
          salary: 20,
        },
      },
    })

    let count = shallowRef({
      num: 0,
    })
    console.log(count)
    // 返回一个对象
    return {
      person,
      count,
      ...toRefs(person),
    }
  },
}
</script>  